Reverse unison brackets position

[Николай Аничков]

Hi! You could tell me how to change the position of the unison brackets
from bottom to top.
[image: Файл]
Tripping-up-the-stairs.ly
<https://drive.google.com/file/d/17Ur5TEf05TBq8Kr40cVabQ2a4cF8KKrC/view?usp=drivesdk>
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С уважением, Николай Аничков.